It's hard to tell from the pictures but I hope that it's the exhaust port that's polished to prevent (slow down at least) carbon build up and the intake is rough to prevent fuel puddling, and not the other way round.

It's hard to tell from the pictures but I hope that it's the exhaust port that's polished to prevent (slow down at least) carbon build up and the intake is rough to prevent fuel puddling, and not the other way round.

Your buddy does nice work in the ports BTW.

Now the seats need to be cut and blended in.

Pretty sure he has done things right. He will do the final valve seat cuts when the valves are finished

The slow rebuild continues. You can see that the clutch side of the crankcases is much emptier now without the electric start drive and its centrifugal engagement assembly (much lighter too ). Also got the cover plug out and installed the kick start seal. Just waiting for the final head work

Has anyone done a gram for gram comparison between the electric starter bits and the kick start bits? The kickstarter mechanism on my XS650 engine, which includes the arm itself, the shaft and all gears, is heavy as hell. Not saying the kick start deal is heavier, but if we're talking about just a few grams, while keeping the ability to just push a button to start, many would choose the electric option. Seems like everyone's first inclination, when it gets in their head to lighten the bike, is remove the electric starter.

The kickstarter spline shaft (for lack of a better name) could be partially center drilled. Just go deep enough that you don't penetrate through the back side. A fabricated tubular aluminum kickstarter lever would be nice too. Lot's of weight to be shed there.

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Visit www.chrislivengood.net to get more information on my RD350 dubbed Mia Wallace as well as my other projects and snafus.

Kick-start lever is probably a 'standard ' Yamaha spline so one of the motocross bikes may have a direct bolt on ally kick-start lever? As for electric start, as pointed out, even on XS 650 you save at least 10 lbs by removing it and all the reduction gears then use a much smaller battery. BTW, are the valve springs one off or are they a standard fitment on something?

« Last Edit: Sep 03, 2019, 21:21:07 by crazypj »

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